services/provisioning-service/src/main/java/com/epam/datalab/backendapi/core/response/handlers/LibInstallCallbackHandler.java
<reponame>ep-infosec/incubator-datalab/*
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  The ASF licenses this file
 * to you under the Apache License, Version 2.0 (the
 * "License"); you may not use this file except in compliance
 * with the License.  You may obtain a copy of the License at
 *
 *   http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing,
 * software distributed under the License is distributed on an
 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
 * KIND, either express or implied.  See the License for the
 * specific language governing permissions and limitations
 * under the License.
 */

package com.epam.datalab.backendapi.core.response.handlers;

import com.epam.datalab.backendapi.core.commands.DockerAction;
import com.epam.datalab.dto.UserInstanceStatus;
import com.epam.datalab.dto.exploratory.LibInstallDTO;
import com.epam.datalab.dto.exploratory.LibInstallStatusDTO;
import com.epam.datalab.dto.exploratory.LibraryInstallDTO;
import com.epam.datalab.exceptions.DatalabException;
import com.epam.datalab.rest.client.RESTService;
import com.epam.datalab.rest.contracts.ApiCallbacks;
import com.fasterxml.jackson.annotation.JacksonInject;
import com.fasterxml.jackson.annotation.JsonCreator;
import com.fasterxml.jackson.annotation.JsonProperty;
import com.fasterxml.jackson.core.type.TypeReference;
import com.fasterxml.jackson.databind.JsonNode;
import lombok.extern.slf4j.Slf4j;

import java.io.IOException;
import java.time.Instant;
import java.util.Date;
import java.util.List;

/**
 * Handler of docker response for the request for libraries installation.
 */
@Slf4j
public class LibInstallCallbackHandler extends ResourceCallbackHandler<LibInstallStatusDTO> {

    /**
     * Name of node in response "Libs".
     */
    private static final String LIBS = "Libs";

    /**
     * Full name of node in response "Libs".
     */
    private static final String LIBS_ABSOLUTE_PATH = RESPONSE_NODE + "." + RESULT_NODE + "." + LIBS;

    /**
     * Exploratory DTO.
     */
    @JsonProperty
    private final LibraryInstallDTO dto;

    /**
     * Instantiate handler for process of docker response for libraries installation.
     *
     * @param selfService REST pointer for Self Service.
     * @param action      docker action.
     * @param uuid        request UID.
     * @param dto         contains libraries to instal
     */
    @JsonCreator
    public LibInstallCallbackHandler(
            @JacksonInject RESTService selfService,
            @JsonProperty("action") DockerAction action,
            @JsonProperty("uuid") String uuid, @JsonProperty("user") String user,
            @JsonProperty("dto") LibraryInstallDTO dto) {
        super(selfService, user, uuid, action);
        this.dto = dto;
    }

    @Override
    protected String getCallbackURI() {
        return ApiCallbacks.LIB_STATUS_URI;
    }

    @Override
    protected LibInstallStatusDTO parseOutResponse(JsonNode resultNode, LibInstallStatusDTO status) {

        if (UserInstanceStatus.FAILED == UserInstanceStatus.of(status.getStatus()) || resultNode == null) {
            throw new DatalabException("Can't handle response result node is null or response status is failed");
        }

        JsonNode nodeLibs = resultNode.get(LIBS);
        if (nodeLibs == null) {
            throw new DatalabException("Can't handle response without property " + LIBS_ABSOLUTE_PATH);
        }
        try {
            final List<LibInstallDTO> libs = mapper.readValue(nodeLibs.toString(),
                    new TypeReference<List<LibInstallDTO>>() {
                    });
            status.withLibs(libs);
        } catch (IOException e) {
            log.warn("Can't parse field {} for UUID {} in JSON", LIBS_ABSOLUTE_PATH, getUUID(), e);
        }

        return status;
    }

    @Override
    protected LibInstallStatusDTO getBaseStatusDTO(UserInstanceStatus status) {
        return super.getBaseStatusDTO(status)
                .withExploratoryName(dto.getExploratoryName())
                .withComputationalName(dto.getComputationalName())
                .withProject(dto.getProject())
                .withUptime(Date.from(Instant.now()));
    }
}
